Glossary
Battery
An electrical energy source consisting of one or more primary (non-rechargeable) or secondary (rechargeable) cells.
Strictly speaking, a single cell is not a battery and a rechargeable battery is called an accumulator. In common usage, the term battery is nevertheless also used for monocells and rechargeable accumulators such as car batteries. When we speak of battery here, we almost invariably mean rechargeable accumulators.